<html>
  <body style="padding: 0; margin: 0; display: grid; display: grid; grid-template-columns: 50% 50%; grid-template-rows: 50% 50%;\">
    <div style="background-color: rgb(255, 0, 0);"></div>
    <div style="background-color: rgb(0, 255, 0);"></div>
    <div style="background-color: rgb(0, 0, 255);"></div>
    <div style="background-color: rgb(128, 128, 128);"></div>
  </body>
</html>
